I be good at writing 还是 I am good at writing

问题描述:

I be good at writing 还是 I am good at writing

I am good at writing

I am good at writing。

这题的正确答案是:
I am good at writing.
因为在一个简单句中,不能用它的动词原形,而要用它的一般现在时态形式.

am